What Monthly Withdrawal Amount Can Your Corpus Actually Support? A Practical Guide to Planning Your SWP

Ask a new retiree what they want from their SWP and you will usually hear a monthly figure, not a plan. ₹60,000, maybe ₹75,000 if a home loan is still running. That figure then goes into an SWP calculator along with an expected return of 10 or 12 percent, often taken from the previous year’s returns, and the projection shows the corpus lasting for decades. The plan looks secure on paper.

The projection is not wrong; it simply does not account for all the financial challenges a retiree may face. Prices continue to rise over time, markets can fall at inconvenient moments, and the tax on each payout varies with the gains in the units being redeemed.

How an SWP Calculator Arrives at Its Number

Most SWP calculator screens look alike: a box for the amount invested, one for the monthly withdrawal, a slider for expected return, and another for years. The arithmetic behind them is blunt. The same return gets applied every year, as though the market never has a bad one.

Indian markets have had plenty of bad ones. On a total return basis, the Nifty 50 TRI fell about 51% in 2008 and rose about 78% in 2009. The simple average, about 13% a year, looks healthy. Over the two years combined, however, the index still ended below its level at the start of 2008. An investor withdrawing a fixed amount every month through that period would have fallen well short of a 13% projection, because the withdrawals made during the downturn required units to be sold at low prices.

Index figures reflect historical movements of the Nifty 50 TRI. Past performance is not indicative of future returns.

An SWP calculator is therefore best used to test a range of assumptions. Put in 9% and note the result, then try 6% with the withdrawal rising 6% a year. If the corpus runs out a decade sooner the second time, that gap is the real information.

A Fixed ₹70,000 Shrinks Faster Than It Looks

Prices rising at 6% a year roughly halve what a rupee buys in twelve years. Apply that to ₹70,000 and, ten years into retirement, the monthly payout buys about what ₹39,000 does today. 6% is a moderate assumption. Retail inflation was 5.54% in September 2026, according to provisional MoSPI data, well above the RBI’s 4% target, and retired households can feel more than that as medical bills take a larger share of the budget.

How Long ₹1 Crore May Last

Monthly Withdrawal	Withdrawal Kept Fixed	Withdrawal Raised 6% Each Year
₹70,000	Approximately 33 years	Approximately 14 years
₹1,00,000	Approximately 13 years	Approximately 9 years

Hypothetical illustration: ₹1 crore corpus, assumed constant return of 8% a year (compounded monthly at an equivalent rate), withdrawals at the end of each month, with the 6% increase applied once every 12 months. Figures are before tax. It does not represent any scheme’s performance, and returns are not guaranteed.

Look closely at the ₹70,000 row. Held flat, the money lasts about 33 years in this illustration; raised by 6% every year, it runs out in roughly 14. Same corpus, same 8% assumption. Since most households will need withdrawals to rise at some point, an SWP calculator used without that annual increase gives a reassuring but incomplete answer.

Why the Timing of a Market Fall Matters in an SWP

Planners call this sequence-of-returns risk, though the idea is simple enough. Losses early in an SWP hurt far more than the same losses later on.

In March 2020 the Nifty 50 dropped about 38% from its January high, and it took until November to get back there. Apply a similar fall to a hypothetical fund whose NAV slides from ₹100 to ₹62. Before the fall, a ₹70,000 payout meant redeeming 700 units. After it, the same payout needs roughly 1,129, and those extra units are gone by the time prices recover. Had the crash come fifteen years into the SWP, the damage would have been far smaller, because most of the money would already have been spent.

None of this shows up in an SWP calculator that uses one steady return. Some retirees keep a separate pot instead, usually two or three years of withdrawals, in a liquid or short-duration debt fund. Payouts come from that pot in bad equity years, and it gets topped up from equity after a recovery. Volatility is still there, of course. The buffer simply removes the need to sell equity at a low point to meet routine expenses.

What Gets Taxed When the Money Comes Out

With a fixed deposit, every rupee of interest is taxed at your slab rate. An SWP payout is treated differently. Suppose ₹70,000 is withdrawn in a month and the units sold had a cost of ₹60,000. Only the ₹10,000 difference is a capital gain; the other ₹60,000 is your own money coming back and is not taxed again.

Which rate applies depends on the fund and how old the units are, and the oldest units are sold first. In an equity-oriented scheme, gains on units held over 12 months are long-term: the first ₹1.25 lakh of them each year is exempt, and the rest is taxed at 12.5%. Units held 12 months or less are taxed at 20%. Surcharge and cess come on top. Debt fund units bought on or after 1 April 2023 are taxed at the slab rate, however long they are held.

Any figure an SWP calculator shows should be read as pre-tax.

Picking the Category Behind the SWP

Equity-oriented funds bring the growth potential that may help a corpus keep up with inflation and also the swings that create sequence risk. Debt funds generally move more gently, with lower long-term growth potential and slab-rate tax on newer investments. Hybrid funds sit in between, and their tax treatment depends on how much equity the scheme holds, so each deserves its own return assumption in an SWP calculator.

A 60-year-old planning for 25 years of income and a parent paying four years of college fees are not in the same position, and the mix should reflect that. A SEBI-registered investment adviser can help work through the choice.

Conclusion

No corpus has one “safe” monthly figure. It has a band of possible figures, and that band narrows once inflation, an early market fall, and taxes are allowed in. The most useful thing an SWP calculator can do is show the cautious version of your plan before the first payout goes out. If that version still works, raising withdrawals later is straightforward. Reducing them during a falling market, once the household has adjusted to a larger payout, is far harder.

Mutual fund investments are subject to market risks. Past performance is not indicative of future returns. Returns are not guaranteed. Please read all scheme-related documents carefully. Investors are advised to consult a SEBI-registered investment adviser before making any investment decisions.